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Test Description

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

The number(s) below refer to the step number(s) on the diagnostic table.

  1. 5. The specified values are from the A/C System Performance Test.
  2. 6. The functionality of the auxiliary air temperature drive shaft is questioned.
  3. 7. The functionality of the auxiliary air temperature door control circuit of the auxiliary HVAC control module is questioned.
  4. 8. This step questions the status of the air temperature door position signal communication between the front and auxiliary HVAC control modules.
  5. 9. This step checks for proper auxiliary air temperature actuator drive shaft movement.
  6. 10. The voltage will vary between 0.25-14,7 volts during normal operation. The HVAC control module connector must be connected during this step. This checks for proper operation of the air temperature actuator door control circuit and the HVAC control module.
  7. 13. The voltage will vary between 0.25-14.7 volts during normal operation. The HVAC control module connector must be connected during this step. This checks for proper operation of the air temperature actuator door control circuit and the HVAC control.
  8. 14. The auxiliary blower motor switch control circuit should not have continuity to ground when front auxiliary blower control switch is in any position except REAR CNTL.
  9. 16. The voltage will vary between 0.25-14.7 volts during normal operation. The auxiliary HVAC control module connector must be connected during this step.
    Fig 1: Too Hot in Vehicle - Auxiliary (1 Of 4)
    G01828203Courtesy of GENERAL MOTORS CORP.
    Fig 2: Too Hot in Vehicle - Auxiliary (2 Of 4)
    G01828204Courtesy of GENERAL MOTORS CORP.
    Fig 3: Too Hot in Vehicle - Auxiliary (3 Of 4)
    G01828205Courtesy of GENERAL MOTORS CORP.
    Fig 4: Too Hot in Vehicle - Auxiliary (4 Of 4)
    G01828206Courtesy of GENERAL MOTORS CORP.